Duct device

Abstract

In a duct device that includes a duct body 9 having: an air flow path 90 defined thereinside; and a first divisional body 1 and a second divisional body 5 combined in a combining direction in which the first and second divisional bodies 1 and 5 approach each other, at time of positioning when a first duct portion 2 and a second duct portion 6 oppose each other, and an engagement portion 33 and an engagement projection 7 do not engage with each other, an outer wall portion 65 covers, from an outer side, a tip portion 21 that is a front end of the first duct portion 2, and the engagement portion 33 contacts with the engagement projection 7 in the combining direction, and covers a second engagement surface 72 that is a rear end of the engagement projection 7, with an engagement wrap portion 35, from the outer side.

The invention claimed is: 
     
       1. A duct device comprising:
 a duct body in which an air flow path is defined, and a first divisional body and a second divisional body are combined in a combining direction in which the first divisional body and the second divisional body approach each other, wherein 
 the first divisional body includes a first duct portion that is a part of the duct body, and an engagement piece having a leg portion and an engagement portion, the leg portion being integrated with the first duct portion and extending in the combining direction on an outer side of the first duct portion, the engagement portion being disposed at a front end of the leg portion, 
 the second divisional body includes a second duct portion that is another part of the duct body, an outer wall portion, and an engagement projection, the outer wall portion being integrated with the second duct portion and extending in the combining direction on an outer side of the second duct portion, the engagement projection projecting outward from the outer wall portion and engaging with the engagement portion at a time of combination of the first divisional body and the second divisional body with each other, and 
 when the first duct portion and the second duct portion oppose each other at a time of positioning, and the engagement portion and the engagement projection do not engage with each other,
 the engagement portion and the engagement projection contact with each other in the combining direction, 
 the outer wall portion covers, from an outer side, a tip portion that is a front end of the first duct portion, and a distance from the tip portion relative to the second duct portion is smaller than a distance from an end of the outer wall portion on the first duct portion side relative to the second duct portion, and 
 the engagement portion covers an engagement surface that is a rear end of the engagement projection, with an engagement wrap portion, from the outer side. 
 
 
     
     
       2. The duct device according to  claim 1 , wherein
 an end portion of the second duct portion and the outer wall portion form a rail portion disposed so as to include a gap in an inner-outer direction, and 
 a seal portion that is an end portion of the first duct portion has a pointed shape having a tilted surface which is tilted toward the tip portion, and the seal portion is inserted into the gap of the rail portion at the time of positioning. 
 
     
     
       3. The duct device according to  claim 2 , wherein
 the tilted surface of the seal portion contacts with the end portion of the second duct portion and the outer wall portion at the time of combination. 
 
     
     
       4. The duct device according to  claim 3 , wherein
 the first divisional body has a first rib that is integrated with the first duct portion, and extends in the combining direction on the outer side of the first duct portion. 
 
     
     
       5. The duct device according to  claim 4 , wherein
 the second divisional body has two second ribs that are integrated with the outer wall portion, and extend in the combining direction on an outer side of the outer wall portion. 
 
     
     
       6. The duct device according to  claim 5 , wherein
 the two second ribs are disposed on both sides of the engagement projection, and 
 the engagement portion is disposed between the two second ribs at the time of combination. 
 
     
     
       7. The duct device according to  claim 6 , wherein
 a portion of the leg portion on the first duct portion side has a flat surface that intersects the combining direction at 80° to 100°. 
 
     
     
       8. The duct device according to  claim 1 , wherein
 the first divisional body has a first rib that is integrated with the first duct portion, and extends in the combining direction on the outer side of the first duct portion. 
 
     
     
       9. The duct device according to  claim 8 , wherein
 the second divisional body has two second ribs that are integrated with the outer wall portion, and extend in the combining direction on an outer side of the outer wall portion. 
 
     
     
       10. The duct device according to  claim 9 , wherein
 the two second ribs are disposed on both sides of the engagement projection, and 
 the engagement portion is disposed between the two second ribs at the time of combination. 
 
     
     
       11. The duct device according to  claim 10 , wherein
 a portion of the leg portion on the first duct portion side has a flat surface that intersects the combining direction at 80° to 100°. 
 
     
     
       12. The duct device according to  claim 1 , wherein
 the second divisional body has two second ribs that are integrated with the outer wall portion, and extend in the combining direction on an outer side of the outer wall portion. 
 
     
     
       13. The duct device according to  claim 12 , wherein
 the two second ribs are disposed on both sides of the engagement projection, and 
 the engagement portion is disposed between the two second ribs at the time of combination. 
 
     
     
       14. The duct device according to  claim 1 , wherein
 a portion of the leg portion on the first duct portion side has a flat surface that intersects the combining direction at 80° to 100°.